Surprisingly, eucalyptus trees weren't always part of California's landscape—so why are there eucalyptus trees in California? Prior to the 1850s, not a single eucalyptus grew in the state. Today, these towering trees are so common that many mistake them for native species, when in fact, they originate from Australia, where they make up 80 percent of open forests.
The first recorded eucalyptus planting in California dates back to 1853 at the Golden Gate Nursery. From this modest beginning, eucalyptus became increasingly popular after 1870 because it was fast-growing, supposedly fireproof, and believed to have great medicinal value. By 1880, eucalyptus trees were widely planted throughout California. During the "eucalyptus boom" of 1907 to 1913, thousands of acres were planted in both Northern and Southern California, with over 23,000 acres of new eucalyptus groves created in 1909 alone. Interestingly, it's estimated that there were over 100 companies involved in the eucalyptus industry during this period, significantly changing California's landscape.
In this article, we'll explore how eucalyptus trees arrived in California, who brought them, and why these Australian imports became so deeply rooted in California's identity despite not being native to the region.
The first arrival: How eucalyptus trees got to California
The Gold Rush era marked the beginning of a botanical transformation for California's landscape. As thousands rushed to the state seeking fortune, they unknowingly set the stage for the introduction of one of California's most recognizable non-native trees.
Seeds brought by sailors and settlers in the 1850s
The eucalyptus tree's journey to California began in the early 1850s amid the feverish activity of the Gold Rush. Australian immigrants, drawn by tales of gold and opportunity, brought eucalyptus seeds with them across the Pacific. These initial plantings were primarily ornamental, as settlers appreciated the tree's unique appearance and rapid growth.
By 1856, the tree's popularity had grown substantially, with nurserymen in the San Francisco Bay area selling 14 different varieties of eucalyptus. The timing couldn't have been more opportune—California faced increasing deforestation concerns as the Gold Rush created enormous demand for wood, both for constructing buildings and for fuel.
While several parties contributed to the early spread of eucalyptus, the first documented introduction has a fascinating origin story connected to maritime trade and a visionary sea captain.
Captain Robert Waterman and early plantings
The honor of first introducing eucalyptus to California belongs to Captain Robert H. Waterman, a retired clipper ship captain who settled in Suisun Valley in 1850. After purchasing land, Waterman dreamed of planting "a heap o' trees" and commissioned his former first mate, Jim Douglass, to bring eucalyptus seeds from Australia.
In 1853, Douglass delivered a bag of blue gum seeds to Captain Waterman, who planted them throughout his property and along roads in the towns he founded—Fairfield and Cordelia. This momentous introduction eventually transformed California's landscape.
Waterman, assisted by horticultural expert Josiah Allison, meticulously planned his plantings. Together with his partner A.A. Ritchie, they surveyed the Suisun Valley, staking out roads and marking future tree locations. Furthermore, Waterman generously shared eucalyptus seeds with new settlers in Fairfield and friends in other areas, helping spread the trees throughout the region.
Why eucalyptus was seen as a miracle tree
The blue gum eucalyptus (Eucalyptus globulus) quickly earned the nickname "fever tree" or "miracle tree" due to its remarkable properties and perceived benefits.
Among its most impressive qualities was its extraordinary growth rate—up to 20 feet per year—allowing it to reach heights of 150 to over 200 feet. This rapid development made it particularly attractive in a state facing timber shortages. Additionally, the trees could be harvested every seven years for firewood without killing them, as they would regrow from the stumps through a process called coppicing.
The eucalyptus earned its reputation as a versatile resource. Early promoters believed it could provide timber, fuel, medicine, wood pulp, honey, and both medicinal and industrial oils. Moreover, eucalyptus was valued for its ability to grow in various soil types, including poor soils, while requiring minimal rainfall.
Perhaps most compelling were the widespread beliefs about its medicinal properties. Eucalyptus gained popularity as an alleged anti-malarial treatment, with additional claims that smoking its leaves could cure bronchial and pulmonary complaints, drinking eucalyptus tea would "clean the system," and planting the trees around living quarters could prevent cholera epidemics. Although many of these claims were exaggerated or unfounded, they nevertheless contributed to the tree's mystique and rapid adoption.
The eucalyptus boom: Why California embraced the tree
By the 1870s, California faced a severe timber crisis that would spark what locals called "eucalyptus fever." The rapid settlement following the Gold Rush created unprecedented demand for wood resources across the state.
Timber shortages and the Gold Rush demand
The Gold Rush transformed California's relationship with its forests. "This was the era of wood power," as wood was essential for nearly everything—energy, building materials, and infrastructure—uses now served by concrete, plastic, and steel. The frenzied development led to alarming deforestation rates. By 1869, C.F. Reed, President of the State Board of Agriculture, warned that "at least one-third of all our accessible timber of value is already consumed and destroyed".
This crisis wasn't unique to California. Nationally, concerns about timber supplies led the Reverend Frederick Starr to predict a timber famine within 30 years. Later, in 1907, the U.S. Forest Service issued a formal warning about a shortage of Appalachian hardwood, estimating only about a 15-year supply remained.
Facing this shortage, eucalyptus emerged as an ideal solution. The trees grew remarkably fast—4 to 6 feet in height annually and up to an inch in diameter. Some growers reported having 40-foot trees merely six years after planting. Furthermore, eucalyptus could thrive in poor soil conditions where other trees struggled.
Medicinal myths and ornamental appeal
Beyond timber, eucalyptus gained popularity through its supposed medicinal properties. The tree earned enthusiastic endorsements as an anti-malarial treatment, while advocates claimed smoking its leaves could cure bronchial and pulmonary ailments. Others promoted eucalyptus tea as a system cleanser and suggested that planting the trees around living quarters could prevent cholera epidemics.
The California Pharmaceutical Society fueled these beliefs, predicting in 1872 that products from the tree would "ultimately supersede expensive drugs now in use". Eucalyptus oil extracted from leaves was marketed as an antiseptic, antispasmodic, expectorant, stimulant, and deodorant. Most remarkably, promoters claimed it could treat everything from insomnia and fevers to tuberculosis and venereal disease.
Visually, the trees added a dramatic element to California's landscape. Their towering heights, blue-green foliage, and distinctive aroma made them popular ornamental plantings, especially in areas considered "barren and uninviting" by newcomers.
State incentives and the Timber Culture Act
Government policies accelerated eucalyptus adoption throughout California. The state's Tree Culture Act of 1868 encouraged citizens to plant more trees, particularly along roads. Five years later, the federal Timber Culture Act of 1873 required homesteaders to dedicate a portion of their land to trees. For many settlers, the fast-growing eucalyptus was the obvious choice for meeting these requirements.
The economic appeal became irresistible. "For a person who has some capital and is willing to wait for returns, there is a pretty chance to make a fortune in the growing of gum trees," suggested one California newspaper. Railroad companies, notably the Central and Southern Pacific, announced plans in 1877 to plant eucalyptus along their entire lines.
This enthusiasm evolved into a speculative frenzy between 1907 and 1913. Land promoters bought tracts for approximately $15 per acre, planted eucalyptus seedlings costing just $5 per thousand, then sold the land for $25 per acre with promises that the timber would be worth ten times that price within a decade. Investors eagerly purchased these properties, convinced they'd found "a source of emolument higher than that of the average gold mine".
Key figures who spread eucalyptus across the state
While early pioneers introduced eucalyptus to California, a handful of passionate advocates truly catalyzed its spread throughout the state, turning isolated plantings into a landscape-defining phenomenon.
Ellwood Cooper and his Santa Barbara groves
Arguably the first true California eucalyptus evangelist, Ellwood Cooper settled in Santa Barbara in 1870 after a career in diplomatic service. In 1872, he purchased a 2,000-acre ranch near Santa Barbara, naming it Dos Pueblos Ranch, where he began extensive eucalyptus experimentation. Initially a "desolate spot" covered with scrub and oaks, Cooper transformed it into an agricultural showplace.
Cooper's dedication was remarkable—he planted 50,000 trees across more than 50 varieties by the mid-1870s. At his peak, he cultivated as many as 150,000 blue gum eucalyptus trees across 24 species. His 1876 publication "Forest Culture and Eucalyptus Trees" became the standard guidebook for eucalyptus cultivation throughout America. The book emerged from a well-received lecture he gave as president of the college of Santa Barbara, combining his passion for eucalyptus with advocacy for forestry.
Abbot Kinney's forestry campaigns
Tobacco heir Abbot Kinney subsequently elevated eucalyptus from regional curiosity to landscape-altering phenomenon. Though better known today as the developer of Venice, California, Kinney served as chairman of the California Board of Forestry from 1886 to 1888, using this position to aggressively promote eucalyptus.
Kinney established America's first forestry station in Rustic Canyon near Santa Monica on six acres donated by Santa Monica co-founder John P. Jones and Arcadia Bandini de Stearns Baker. This experimental station tested exotic trees for California suitability, with eucalyptus as a primary focus. His advocacy included distributing free eucalyptus seeds across the state.
In 1895, Kinney published a comprehensive 300-page book titled "Eucalyptus," extolling the tree's virtues as a multi-purpose plant. The work sparked renewed interest that eventually culminated in the eucalyptus speculative bubble of 1907.
Nurseries and seed distributors
Commercial nurseries played a crucial role in making eucalyptus widely available. William C. Walker's Golden Gate Nursery in San Francisco likely served as the initial port of call for eucalyptus seeds arriving from Australia.
Stephen Nolan, owner of Oakland's Bellevue Nursery established in 1860, became an active promoter with the most extensive offerings. By 1871, his catalog listed 34 different eucalyptus species. The Pacific Rural Press described his nursery enthusiastically, noting how Nolan envisioned eucalyptus relieving "apparently barren hills" throughout California.
To encourage commercial plantings, the California State Agricultural Society offered a $50 premium in 1870 for the largest quantity of useful trees planted that year. James T. Stratton won by demonstrating he had planted fifty-three and one-half acres of Eucalyptus globulus and three thousand Eucalyptus camaldulensis trees.
The bust: When the eucalyptus dream fell apart
The eucalyptus investment bubble burst dramatically in the early 1900s, revealing a harsh reality about these supposedly miracle trees.
Timber quality issues and failed investments
After years of enthusiastic planting, investors made a devastating discovery—young eucalyptus wood warped, cracked, and split when dried. Unlike Australian eucalyptus, which produced quality timber after 100+ years of growth, California's young trees proved unusable for building purposes. The wood drying techniques of the time were simply too rudimentary for processing eucalyptus effectively.
Perhaps no failure illustrated this better than Oakland developer Frank C. Havens', who planted eight million eucalyptus trees in a 14-mile-long strip from Berkeley through Oakland. Upon harvesting, Havens discovered the young wood had irregular grain that bent, cracked, and shrank when dried. His timber venture collapsed completely. Similar disappointments occurred throughout California as investors realized eucalyptus trees needed to be at least 75-100 years old to produce suitable lumber.
The 1913 USDA report and economic collapse
The final blow came in 1913 when the U.S. Department of Agriculture published a definitive report confirming what many already suspected—eucalyptus wood was unsuitable for lumber. This official declaration effectively ended the speculative bubble.
Consequently, investors were ruined as eucalyptus groves reverted to farmland. Steel, concrete, and other materials stepped in to address the hardwood shortage. Furthermore, California's eucalyptus oil industry collapsed upon discovering it couldn't match the quality of Australian oil.
Shift from timber to ornamental use
Ironically, even as commercial dreams collapsed, eucalyptus trees remained firmly rooted in California's landscape. By 1924, botanists estimated California contained 40,000-50,000 acres of eucalyptus, with 80% being blue gum.
After 1913, eucalyptus was primarily valued for non-timber purposes. Farmers and orange growers planted them as windbreaks, while landscapers embraced them as ornamental trees. The Los Angeles Times reflected this shift in 1927, noting that eucalyptus "seems more essentially California than many a native plant".
Modern legacy: Are eucalyptus trees invasive or iconic?
California's eucalyptus trees now stand at the center of heated environmental debates, with their presence dividing conservationists, firefighters, and residents alike.
Fire risks and the 1991 Oakland Hills fire
First and foremost, the devastating 1991 Oakland Hills firestorm, which killed 25 people and left thousands homeless, thrust eucalyptus into the spotlight. Fire experts point out that eucalyptus trees contribute to fire hazards in several ways: their bark sheds and creates quick-drying fuel, burning bark can be blown miles away spreading fire rapidly, and their oils make them highly flammable. The National Park Service estimated that eucalyptus accounted for approximately 70% of the energy released through vegetation combustion during the Oakland Hills fire.
Impact on native biodiversity and soil
Furthermore, as non-native species, eucalyptus trees can outcompete native flora, disrupting ecological balance and reducing biodiversity. Studies show eucalyptus groves contain significantly more fuel—30.84 tons per acre compared to 11.82 tons per acre in coast live oak communities. Additionally, eucalyptus alters soil chemistry, increasing soil pH as calcium-concentrated leaves decay.
Current debates on removal vs. preservation
Given these points, fierce debates continue between those advocating removal and those supporting preservation. After nearly a decade-long legal battle, UC Berkeley received approval to remove dozens of acres of eucalyptus. However, opposition remains strong—some protesters even hugged trees naked on Berkeley's campus. With approximately 40,000 acres of unharvested eucalyptus crops statewide, this controversy isn't ending soon.
Conclusion
Eucalyptus trees certainly embody one of California's most fascinating botanical tales. Though initially planted with grand visions of solving timber shortages and providing miracle cures, these Australian imports ultimately failed to deliver on their commercial promises. Nevertheless, they transformed California's landscape forever.
The story of eucalyptus reveals how human intervention can dramatically alter ecosystems with unexpected consequences. Captain Waterman's simple act of planting Australian seeds in the 1850s eventually led to millions of trees spreading across the state, creating what many now consider an iconic California image.
Today, these towering sentinels stand at a crossroads. Fire safety experts point to their flammability, especially after the devastating 1991 Oakland Hills fire. Conservationists worry about their impact on native species. Still, many Californians cherish these trees as beloved landmarks that have become woven into the state's identity.
This complex relationship with eucalyptus reflects broader questions about how we define "native" in a rapidly changing world. After all, these trees have been part of California for over 170 years – longer than many human families can trace their roots in the state. Learn more about California trees through local conservation programs that explore both native and introduced species.
Despite their controversial status, eucalyptus trees undoubtedly represent a living museum of California's ambitious past. Their presence reminds us how human dreams, economic forces, and nature itself interact in ways we cannot always predict. The eucalyptus story, therefore, stands as a cautionary yet fascinating chapter in California's environmental history – one that continues to unfold before our eyes.
FAQs
Q1. Why are there eucalyptus trees in California if they're not native? Eucalyptus trees were introduced to California in the 1850s during the Gold Rush era. They were brought as seeds by Australian immigrants and sea captains, and quickly gained popularity due to their rapid growth and perceived benefits.
Q2. What was the "eucalyptus boom" in California? The eucalyptus boom occurred between 1907 and 1913 when investors planted millions of trees, believing they would solve timber shortages. This speculative frenzy was fueled by claims about the trees' rapid growth and versatile uses.
Q3. Who were the key figures responsible for spreading eucalyptus across California? Notable advocates included Ellwood Cooper, who planted extensive groves in Santa Barbara, Abbot Kinney, who promoted eucalyptus as chairman of the California Board of Forestry, and nursery owners like Stephen Nolan who made the trees widely available.
Q4. Why did the eucalyptus investment bubble burst? The bubble collapsed around 1913 when it was discovered that young eucalyptus wood was unsuitable for lumber, warping and cracking when dried. A USDA report confirmed these findings, ending commercial timber dreams for eucalyptus.
Q5. Are eucalyptus trees considered a problem in California today? Eucalyptus trees are now controversial in California. They're criticized for increasing fire risks, outcompeting native species, and altering soil chemistry. However, some consider them iconic to California's landscape, leading to ongoing debates about their removal or preservation.